Ages 4-7 · child and adult

Toy car ramp: how far will it roll?

Build a low ramp and predict where the car will stop. Change the height and compare the distances.

Set your own pace. Preparation depends on your materials.

What to gather

Toy car without detachable small parts
Stiff cardboard and one or two thin books
Paper strip to mark the stopping point

Keeping it safe Use only a low ramp on the floor, away from stairs and walkways. Never stand or sit on it. An adult stays with the child.

Choose a challenge level

Ages 4-5

Your child predicts and marks the stopping point. The adult steadies the ramp and releases the car.

Ages 6-7

Try each height several times. Measure with the same strip or block. If results vary, look for differences in how the car was released.

Step-by-step instructions

On the floor, rest the cardboard on one thin book. Clear a run-out area and mark the starting position.
Let your child point to their prediction. Release the car without pushing and mark where it stops. Repeat from the same place.
Add a second thin book beneath the ramp. Keep the car, starting point and floor surface the same. Compare the distances.

TATAAA

Now turn it into a game

Custom garage: make a wide paper parking area where the car tends to stop. Try parking without pushing. Swap driver and builder roles.

When it gets tricky

Does the car turn? Check the flatness of the cardboard, the wheels and the floor. Do not keep raising the ramp just to make it faster.

When an experiment goes wrong

When you are done

Point to two stopping positions and name the change you made. Noticing that the car keeps turning is a result too.

If your child does not want to continue, it is fine to stop. You can safely swap roles or adapt the rules.

What to notice

As the car rolls downhill, gravitational potential energy becomes kinetic energy (motion). Friction and the wheels also affect the distance, so keep the floor surface unchanged.